Studies of enzyme genotypes and flight in Colias butterflies showed that
A) males that are heterozygous for the PGI gene are always inferior in flight compared with homozygotes.
B) males that are heterozygous for the PGI gene have greater mating success than homozygous males because they are able to fly farther in a broad range of temperatures.
C) genotypes for the PGI gene do not affect flight ability.
D) flight ability and mating success are not correlated.
E) flight ability can be explained by Muller's ratchet.

Question

Quizplus · Accepted Answer

The study found that males heterozygous for the PGI gene had greater mating success because they were able to fly farther in a broad range of temperatures. This suggests that genotypes for the PGI gene do affect flight ability and that heterozygous individuals have an advantage in this regard. The other choices are not supported by the study.

Studies of Enzyme Genotypes and Flight in Colias Butterflies Showed